Bmw 120i 2004 coolant leak HELP (Coolant loss overnight)

[prevag]

I need some advice. Bought a bmw 1 series e87 , it shows a loss of coolant overnight . I fill coolant and the next day it all leaks out , this tends to happen only when the car is in use if I leave it standing the coolant stays in the water bottle . I jacked the car up and saw the coolant dripping out from the left bottom of the engine I need advice on which part could be causing it . I also noticed a couple of times the low coolant light would come on while there still is water there.

[zelius99]

Could be crack in expansion tank or one of many lines leaking

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